Building core



Feb. 25, 1930. (3.1-1 WIKLE 1,743,255

' BUILDING-CORE Filed Nov. 1 1925 GeorgeFl V/kk I Inverrl-ar PatentedFeb. 25; 1930 UNITE GEORGE E. WIKLE, E MILWAUKEE, Wiscons n, ASSIGNORTo'TiiE EIsK RUBBER COMPANY, or CHIGOPEE FALLS, MASSACHUSETTS, ACORPORATION or MASSACHU- SETTS BUILDING "ooRE Application filed November14, 1925. Serial No; 69,122.

' My invention relates to an improvement in collapsible building coresused in the manufacture of pneumatic tire casings and has for its objecta'construction which will facilitate removal of the casing from thecollapsed core. In general my invention consists in so con structing thetips of certain of the core sec tions as .to decrease the obstructionoffered to the removal of the casing by the collapsed sections. It isamong the objects of my invention to provide a construction such thatthe core tips will drop freely under the action of gravity withoutfrictional resistance between the adjacent faces of the tip and corebody. In the drawings which illustrate one embodiment of my inventionFigure 1 is a side View of the tip of a core section,

Figure 2 is a front view of the structure shows in Figure 1, I

Figure 3 is a section substantially on line 3-3'of Figure 1, and

Figure 4 is a diagrammatic View of two core sections in collapsedrelation showing the manner in which my improved core operatesi In thedrawings I have shown a core collapsible in four sections designated as.1, 1 and 2, 2. In order to secure proper alignment the faces of thesections are provided I with interfitting portions 3 having irregularedges 4. This latter is a conventional feature and forms no part of myinvention. In carrying out my invention I form the tip portion of thesections 1, 1 as movable units 5, hinged to the body of'the section by alink 7 pivotally engaging rods 8 and 9 secured respectively in thebody 1and the tip 5. The manner of accomplishing the pivoted connection isclearly shown in Figure 3 where the ends of rod 8 are shown anchored at11 in the walls of the core and the link 7 is secured.

in adjusted longitudinal position on the rod by collars 12 provided withset screws 13. Link 7 is similarly adjustably mounted on rod 9. Theengaging faces of tip 5 and core body 1 are formed by engaging plates 14and 16 secured respectively to tip and core body by machine screws 17plate 14 acting as a stop to accurately position the tip as shown inFigure 1.. I

As will be obvious, when the core is collapsed as shown in Figure 4 thetips 5 dropby gravity thus decreasing the normal distance from tip totip of sections 1. It will also be obvious that as the tip drops itswings slightly away from the core body permitting free movement. Vhenthe collapsed core is set upsections 1 separate and sections 2, movingoutwardly to complete the annulus, engage tips 5 and move them into theposition shown in Figure 1.

It will be understood that any conventional type of collapsing chuck maybe used to operate the core sections.

Having described an illustrative embodiment of my invention, I claim:

1. In a collapsible core, a composite section subdivided into a main anda small supplementary section forming a tip of the section, thesupplementary section being pivoted to the main section upon a pivotlocated within the body of the composite section.

2. In a collapsible core a composite section subdivided into a main anda small supplementary section forming a tip of the section, thesupplementary section being internally pivoted to the main section andcomprising less than a complete cross-section of the core.

3. In a collapsible core, a core section having its tip portion,comprising less than a complete cross-section of the core, divided fromthe main section by an angular cut and a pivotal connection between thebody of the section and the tip portion. 7

4 A collapsible core section having its tip portion, comprising lessthan a complete cross-section of the core, formed as a separate elementmovable with respect to the body of the core section to separate theadjacent faces of the tip and body. 5. A collapsible core section havingits tip portion, comprising less than a complete cross-section of thecore, formed as a separate element, and means connecting the tip tothebody of the section permitting relative movement between the body andtip to decrease the effective length of the section.

6. A collapsible core section having its'tip portion, comprising lessthan a complete cross-section of the core, formed as a separate element,and means connecting the tip to the V 5 body of the section permittingspaced bodily movement between the body and tip, the gen gaging faces ofthe body and tip being provided With means to secure alignmentthereofWhen in operative position. i :7. A collapsible core sectionhaving its tip portion, comprising less than a complete cross-section ofthe core, formed as a separate element, and a link connecting the, tipof the body of the section, said link adapted to permit transverseadjustment of the tip and body portions. I 8. A collapsible core sectionhavingits tip portion, comprising less than a complete cross-section ofthe core,formed as a separate element movable With respect to the bodyof the section and means to secure transverse and vertical alignment ofthe tip with respect to thevbody portion.

.9. A collapsible core section having its tip portion, comprising lessthan a complete cross-section of the core, formed as a separate element,a link connecting the tip and the body of the section, means to permittransverse adjustmentof the link With respectto both the tip and thebody of the section, and

abutments formed respectively on the adjacent faces of the tip and thebody of the section to secure vertical alignment thereof. In testimonywhereof I have signed my name to the above specification.

" GEORGE F. WIKLE.

